SHOCK PROOF POLY-OLEFINE COMPOSITIONS Russian patent published in 2011 - IPC C08L23/10 C08L23/16 C08L23/08 C08F210/06 B29C45/00 

FIELD: metallurgy.

SUBSTANCE: composition consists of copolymer of propylene, of first copolymer of ethylene with at least one linear or branched alpha-olefine having 3-8 carbon atoms and of second copolymer of ethylene with at least one linear or branched alpha-olefine having 3-8 carbon atms. Copolymer of propylene has value of poly-dispersity index within ranges from 4.5 to 10 and contents of isotactic penthalogy above 97.5 mol %. Also, said copolymer contains at least 95 wt % (relative to copolymer) links derivative from propylene. The first copolymer - copolymer of ethylene contains from 25 to less, than 40 wt % relative to this copolymer) links derivative from ethylene and is soluble in xylol at 25°C within the ranges from over 85 to 95 wt %, while the second copolymer of ethylene contains from 50 to less 75 wt %relative to this copolymer) links derivative from ethylene and is soluble in xylol at 25°C within the ranges from over 50 to 85 wt %, and possesses characteristic viscosity of fraction soluble in xylol below 1.8 sh/g.

EFFECT: composition possesses good resistance to stress causing whitening, and lustre combined with good balance of mechanical properties.

8 cl, 3 tbl, 2 ex